PFAS or Per- and Polyfluoroalkyl Substances, have been around since the 1940’s and are used in a wide-range of commercial and consumer products from treatments of paper and fabrics, to industrial applications, and use in fire-fighting foams.

Vapor Intrusion occurs when there is a migration of vapor-forming chemicals from any subsurface source into an overlying building. Over the last several years, Vapor Intrusion exposure pathways has become a key factor guiding the regulatory closure process, thus it is important to fully understand and be fully engaged in the vapor intrusion data collection process.

PFAS or Per- and Polyfluoroalkyl Substances, have been around since the 1940’s and are used in a wide-range of commercial and consumer products from treatments of paper and fabrics, to industrial applications, and use in fire-fighting foams.

Vapor Intrusion occurs when there is a migration of vapor-forming chemicals from any subsurface source into an overlying building. Over the last several years, Vapor Intrusion exposure pathways has become a key factor guiding the regulatory closure process, thus it is important to fully understand and be fully engaged in the vapor intrusion data collection process.